Abstract: A hydrostatic mechanical power split transmission includes a housing, at least one first power branch having at least one hydraulic pump and at least one hydraulic motor, and at least one drive shaft provided with gear wheel elements, which is disposed inside the housing and can be directly or indirectly driven by at least one drive engine, in particular an internal combustion engine as a further power branch, the drive shaft being able to selectively act either directly or indirectly on the sun gear of a planetary gear system by way of at least one clutch, to be decoupled from the planetary gear system, wherein the planetary gear system can be switched to a state of constrained motion by way of further clutches as a function of the respective operating state of the power split transmission.

Abstract: A hydrostatic mechanical power split transmission includes a housing, at least one first power branch having at least one hydraulic pump and at least one hydraulic motor, and at least one drive shaft provided with gear wheel elements, which is disposed inside the housing and can be directly or indirectly driven by at least one drive engine, in particular an internal combustion engine as a further power branch, the drive shaft being able to selectively act either directly or indirectly on the sun gear of a planetary gear system by way of at least one clutch, to be decoupled from the planetary gear system, wherein the planetary gear system can be switched to a state of constrained motion by way of further clutches as a function of the respective operating state of the power split transmission.

Abstract: A hybrid drive for vehicles includes at least a main engine, especially an internal combustion engine, a generator, an electric engine, and a planetary transmission including a sun wheel, an internal-geared wheel, a planet carrier, and planet wheels. The planetary transmission also includes at least one output shaft. For a first driving mode of the vehicle, the drive shafts of the main engine and the electric engine are coupled to the sun wheel of the planetary transmission, for the addition of the torques, and, for another driving mode of one of the engines, one of the two engines can be coupled to the internal-geared wheel of the planetary transmission in a non-positive manner, for the mechanical addition of the rotational speeds according to the superposition principle.